Wis. Admin. Code Department of Natural Resources NR 273.043
Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by application of BAT:
Table 4-17
Precious Metals
Rolling Spent Emulsions
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals rolled with emulsions | |
Cadmium | 0.026 | 0.012 |
Copper | 0.147 | 0.077 |
Cyanide | 0.023 | 0.010 |
Silver | 0.032 | 0.013 |
Table 4-18
Precious Metals
Drawing Spent Emulsions
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals drawn with emulsions | |
Cadmium | 0.016 | 0.007 |
Copper | 0.091 | 0.048 |
Cyanide | 0.014 | 0.006 |
Silver | 0.020 | 0.008 |
Table 4-19
Precious Metals
Drawing Spent Soap Solutions
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals drawn with soap solutions | |
Cadmium | 0.001 | 0.0005 |
Copper | 0.006 | 0.003 |
Cyanide | 0.0009 | 0.0004 |
Silver | 0.002 | 0.0006 |
Table 4-20
Precious Metals
Metal Powder Production
Wet Atomization Wastewater
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals powder wet atomized | |
Cadmium | 2.27 | 1.0 |
Copper | 12.7 | 6.68 |
Cyanide | 1.94 | 0.802 |
Silver | 2.74 | 1.14 |
Table 4-21
Precious Metals
Heat Treatment Contact Cooling Water
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of extruded precious metals heat treated | |
Cadmium | 0.142 | 0.063 |
Copper | 0.793 | 0.417 |
Cyanide | 0.121 | 0.050 |
Silver | 0.171 | 0.071 |
Table 4-22
Precious Metals
Semi-Continuous or Continuous Contact Cooling Water
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals cast by the semi-continuous or continuous method | |
Cadmium | 0.350 | 0.155 |
Copper | 1.96 | 1.03 |
Cyanide | 0.299 | 0.124 |
Silver | 0.430 | 0.175 |
Table 4-23
Precious Metals
Direct Chill Casting Contact Cooling Water
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals cast by the direct chill method | |
Cadmium | 0.3676 | 0.162 |
Copper | 2.05 | 1.08 |
Cyanide | 0.313 | 0.130 |
Silver | 0.443 | 0.184 |
Table 4-24
Precious Metals
Shot Casting Contact Cooling Water
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals shot cast | |
Cadmium | 0.125 | 0.055 |
Copper | 0.698 | 0.367 |
Cyanide | 0.107 | 0.044 |
Silver | 0.151 | 0.063 |
Table 4-25
Precious Metals
Pressure Bonding Contact Cooling Water
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals base metal pressure bonded | |
Cadmium | 0.0297 | 0.013 |
Copper | 0.159 | 0.084 |
Cyanide | 0.0247 | 0.010 |
Silver | 0.0342 | 0.014 |
Table 4-26
Precious Metals
Surface Treatment Spent Baths
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals surface treated | |
Cadmium | 0.033 | 0.015 |
Copper | 0.183 | 0.097 |
Cyanide | 0.028 | 0.012 |
Silver | 0.040 | 0.017 |
Table 4-27
Precious Metals
Surface Treatment Rinse
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals surface treated | |
Cadmium | 0.210 | 0.093 |
Copper | 1.17 | 0.616 |
Cyanide | 0.179 | 0.074 |
Silver | 0.253 | 0.105 |
Table 4-28
Precious Metals
Alkaline Cleaning Spent Baths
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned | |
Cadmium | 0.021 | 0.009 |
Copper | 0.114 | 0.060 |
Cyanide | 0.018 | 0.007 |
Silver | 0.025 | 0.010 |
Table 4-29
Precious Metals
Alkaline Cleaning Rinse
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned | |
Cadmium | 0.381 | 0.168 |
Copper | 2.13 | 1.12 |
Cyanide | 0.325 | 0.135 |
Silver | 0.459 | 0.191 |
Table 4-30
Precious Metals
Alkaline Cleaning Prebonding Wastewater
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals and base metal cleaned prior to bonding | |
Cadmium | 0.400 | 0.174 |
Copper | 2.210 | 1.16 |
Cyanide | 0.337 | 0.139 |
Silver | 0.476 | 0.197 |
Table 4-31
Precious Metals
Tumbling or Burnishing Wastewater
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals tumbled or burnished | |
Cadmium | 0.412 | 0.182 |
Copper | 2.300 | 1.21 |
Cyanide | 0.351 | 0.145 |
Silver | 0.496 | 0.206 |
Table 4-32
Precious Metals
Sawing or Grinding Spent Emulsions
BAT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/off-kg (pounds per million off-pounds) of precious metals sawed or ground with emulsions | |
Cadmium | 0.0327 | 0.014 |
Copper | 0.178 | 0.094 |
Cyanide | 0.0277 | 0.011 |
Silver | 0.0381 | 0.016 |
Wis. Admin. Code Department of Natural Resources NR 273.043